Im telling you it would be better to use a 200mm rad. use a push pull system with the fan's

but if you are willing to sell the level 10 and get the 800D do it.

The 800D would provide more room for you to do your watercooling loop and get a good rad. in there, but use a 3 x 140mm rad at the top, not 120's. just a little more cooling power to lower your temps a little bit.

I was using Koolance external unit EX2-1055 and its pump was broken and I bought it 2.5 years ago and in Turkey there is no technical service for Koolance. So I need to buy new system. My case is Level 10 GT. And I will oc my cpu to 4.5 GHZ at 33 C ambient so I need good system. You can see my system details at bottom. What do you think what will I use? My budget is 400 USD.